A single VH gene segment encodes the immune response to phosphorylcholine: somatic mutation is correlated with the class of the antibody.
D000595:Amino Acid Sequence; D000818:Animals; D000916:Antibody Diversity; D001483:Base Sequence; D001666:Binding Sites, Antibody / Q000235:genetics*; D002794:Choline / Q000031:analogs & derivatives*; D005802:Genes, MHC Class II; D007114:Immunization; D007143:Immunoglobulin Heavy Chains / Q000235:genetics*; D007135:Immunoglobulin Variable Region / Q000235:genetics*; D007136:Immunoglobulins / Q000235:genetics; D051379:Mice; D008807:Mice, Inbred BALB C; D009154:Mutation; D010767:Phosphorylcholine / Q000276:immunology*
D007143:Immunoglobulin Heavy Chains; D007135:Immunoglobulin Variable Region; D007136:Immunoglobulins; D010767:Phosphorylcholine; D002794:Choline